perfect adventure for all Technology interested guys. It is the largest Dam in the USA. You can walk on top. You can book the power plant (Interior tour of Hoover Dam) tour for $15. Take the elevator ride 530 feet down through the rock wall of Black Canyon and begin a 30 minute guided tour.
P.S. Tip: Park you car on the arizona side (second parking lot on the left side) it's free and you safe $7.